WO2021138895A1 - Uplink channel demodulation method and uplink channel demodulation apparatus - Google Patents

Abstract

The present application provides an uplink channel demodulation method and an uplink channel demodulation apparatus. The method comprises: receiving a sounding reference signal (SRS) sent by a terminal device; receiving an uplink channel sent by the terminal device; and using the SRS to perform channel estimation on the uplink channel and demodulate information carried on the uplink channel. Since the SRS is not carried on the uplink channel, in other words, the SRS and the uplink channel are sent independently, using the SRS to estimate the uplink channel and demodulate the information carried on the uplink channel can reduce the sending of or even eliminate the need to send a demodulation reference signal (DMRS) on the uplink channel. Therefore, the overhead of the DMRS in the uplink channel can be reduced while ensuring the demodulation performance of the data of the uplink channel.

Description

Uplink channel demodulation method and uplink channel demodulation device Technical field

This application relates to the field of wireless communication, and in particular to an uplink channel demodulation method and an uplink channel demodulation device.

Background technique

In the wireless communication transmission process, the network equipment uses the demodulation reference signal (Demodulation Reference Signal, DMRS) of the uplink channel to estimate the channel of the uplink channel and demodulate the information carried by the uplink channel.

Generally, the more demodulation reference signals of the uplink channel, the more accurate the channel estimation based on the demodulation reference signal, and the better the demodulation performance of the network equipment for the data carried on the uplink channel, that is, the higher the accuracy of data transmission. , But the demodulation reference signal overhead is also relatively large. Since the demodulation reference signal and the data of the uplink channel can be multiplexed with different subcarriers in the same time unit, when the demodulation reference signal has a large overhead, the resources available for data transmission become less, resulting in effective data transmission by the system Fewer.

Therefore, it is necessary to propose a method that can ensure the demodulation performance of the uplink channel data and can reduce the overhead of the demodulation reference signal in the uplink channel.

Summary of the invention

This application provides an uplink channel demodulation method, an uplink channel demodulation device, an uplink channel transmission method, and an uplink channel transmission device, which can reduce the demodulation in the uplink channel on the basis of ensuring the demodulation performance of the information carried by the uplink channel Reference signal overhead.

In a first aspect, an uplink channel demodulation method is provided, including: receiving a sounding reference signal SRS sent by a terminal device; receiving an uplink channel sent by a terminal device; using the SRS to demodulate the information carried by the uplink channel .

Since SRS is not carried on the uplink channel, or in other words, SRS and uplink channel are sent independently, therefore, demodulating the uplink channel based on SRS can reduce or even no need to send demodulation reference signal DMRS on the uplink channel. Therefore, it can guarantee the uplink channel. Based on the demodulation performance of the data, the overhead of the demodulation reference signal in the uplink channel is reduced.

Optionally, the transmission parameters of the SRS and the uplink channel are the same, and the transmission parameters include at least one of the following parameters: transmission power, antenna port, precoding matrix, or frequency domain resources.

By making the transmission parameters of the SRS and the uplink channel the same, the channel difference between the SRS and the uplink channel can be reduced, and the effect of demodulating the uplink channel based on the SRS can be improved.

Optionally, the uplink channel includes a non-codebook uplink channel, for example, a non-codebook PUSCH.

In this case, the transmission parameter of the non-codebook uplink channel is the same as the transmission parameter corresponding to the SRS resource indicated by the uplink scheduling request indication (SRI, Schduling Request Indication) of the DCI.

Optionally, the SRS is located in a first time unit, and the first time unit corresponding to the uplink channel is a third time unit, where the first time unit and the third time unit are adjacent time units , Or T time units between the first time unit and the third time unit, T is a positive integer, and T is less than or equal to a second threshold, where the second threshold is preset by a communication protocol Is defined, or the second threshold is indicated by a network device.

By making the time unit carrying the SRS adjacent to the time unit carrying the uplink channel, or keeping the time interval between the two within a small range, it is possible to prevent the channel carrying the SRS from being connected to the uplink due to the large time distance. The channel quality difference of the channel is increased, so that the effect of demodulating the uplink channel based on SRS can be improved.

Optionally, the uplink channel includes a demodulation reference signal DMRS, and demodulating the uplink channel according to the SRS includes: demodulating the uplink channel by using the SRS and the DMRS.

By using SRS and DMRS to demodulate the uplink channel together, the number of reference signals used to demodulate the uplink channel can be increased, and the channel estimation can be more accurate, thereby improving the demodulation performance of the uplink channel.

Optionally, the SRS is located in a first time unit, and the DMRS is located in a second time unit, wherein the first time unit and the second time unit are adjacent time units, or the first time unit The K time units between the unit and the second time unit, K is a positive integer, and K is less than or equal to a first threshold, where the first threshold is predefined by a communication protocol, or the first The threshold is indicated by the network device.

By making the time unit carrying SRS and the time unit carrying DMRS adjacent, or keeping the time interval between the two within a small range, the difference in channel quality between SRS and DMRS can be reduced, thereby improving the SRS and DMRS jointly demodulate the uplink channel.

Optionally, the SRS is also used to perform channel estimation on the uplink channel.

Optionally, the uplink channel includes at least one of the uplink shared channel PUSCH and the uplink control channel PUCCH.

For example, in an implementation manner, demodulating the uplink channel according to the SRS includes: demodulating the PUSCH according to the SRS.

At this time, the PUSCH adopts the same transmission parameters as the SRS.

For another example, in an implementation manner, the demodulating the uplink channel according to the SRS includes: demodulating the PUSCH according to the DMRS included in the SRS and the PUSCH.

At this time, the PUSCH adopts the same transmission parameters as the SRS.

For another example, in an implementation manner, the demodulating the uplink channel according to the SRS includes: using the SRS to demodulate the information carried on the PUCCH.

At this time, the PUCCH uses the same transmission parameters as the SRS. For another example, in an implementation manner, the demodulating the uplink channel according to the SRS includes: using the SRS and the DMRS on the PUCCH to demodulate the PUCCH.

At this time, the PUCCH uses the same transmission parameters as the SRS. For another example, in an implementation manner, the demodulating the uplink channel according to the SRS includes: using the SRS to demodulate the PUCCH and PUSCH.

At this time, the PUCCH and the PUSCH both use the same transmission parameters as the SRS. For another example, in an implementation manner, the demodulating the uplink channel according to the SRS includes: using the SRS, DMRS on PUCCH, and DMRS on PUSCH to perform PUCCH and/or PUSCH demodulation.

At this time, the PUCCH and the PUSCH both use the same transmission parameters as the SRS.

In a second aspect, an uplink channel sending method is provided, including: sending a sounding reference signal SRS to a network device; sending an uplink channel to the network device; wherein the SRS is used for demodulation of information carried by the uplink channel.

Optionally, the SRS is located in a first time unit, and the first time unit corresponding to the uplink channel is a third time unit, where the first time unit and the third time unit are adjacent time units , Or T time units between the first time unit and the third time unit, T is a positive integer, and T is less than or equal to a second threshold, where the second threshold is preset by a communication protocol Is defined, or the second threshold is indicated by a network device.

Optionally, the uplink channel includes a demodulation reference signal DMRS, and the demodulation of the uplink channel is performed based on the SRS and the DMRS.

Optionally, the SRS is located in a first time unit, and the uplink channel is located in a second time unit, wherein the first time unit and the second time unit are adjacent time units, or the first time unit The K time units between the time unit and the second time unit, K is a positive integer, and K is less than or equal to a first threshold, wherein the first threshold is predefined by a communication protocol, or the first A threshold is indicated by the network device.

Optionally, the SRS is also used to perform channel estimation on the uplink channel.

Optionally, the transmission parameters of the SRS and the uplink channel are the same, and the transmission parameters include at least one of the following parameters: transmission power, antenna port, precoding matrix, or frequency domain resources.

Optionally, the uplink channel includes at least one of the uplink shared channel PUSCH and the uplink control channel PUCCH.

In a third aspect, an uplink channel demodulation device is provided, including: a transceiver unit, configured to receive a sounding reference signal SRS sent by a terminal device, and configured to receive an uplink channel sent by the terminal device; a processing unit, configured to use the SRS , Demodulate the information carried by the uplink channel.

Optionally, the SRS is located in a first time unit, and the first time unit corresponding to the uplink channel is a third time unit, where the first time unit and the third time unit are adjacent time units , Or T time units between the first time unit and the third time unit, T is a positive integer, and T is less than or equal to a second threshold, where the second threshold is preset by a communication protocol Is defined, or the second threshold is indicated by a network device.

Optionally, the uplink channel includes a demodulation reference signal DMRS, and the processing unit is specifically configured to demodulate the uplink channel according to the SRS and the DMRS.

Optionally, the SRS is located in a first time unit, and the DMRS is located in a second time unit, wherein the first time unit and the second time unit are adjacent time units, or the first time unit The K time units between the unit and the second time unit, K is a positive integer, and K is less than or equal to a first threshold, where the first threshold is predefined by a communication protocol, or the first The threshold is indicated by the network device.

Optionally, the SRS is also used to perform channel estimation on the uplink channel.

Optionally, the sending parameters of the SRS and the uplink channel are the same, and the sending parameters include at least one of the following parameters:

Transmission power, antenna port, precoding matrix, or frequency domain resources.

Optionally, the uplink channel includes at least one of the uplink shared channel PUSCH and the uplink control channel PUCCH.

In a fourth aspect, an uplink channel sending device is provided, including: a transceiving unit, configured to send a sounding reference signal SRS to a network device, and to send an uplink channel to the network device; wherein, the SRS is used for the uplink Demodulation of the channel.

Optionally, the SRS is located in a first time unit, and the first time unit corresponding to the uplink channel is a third time unit, where the first time unit and the third time unit are adjacent time units , Or T time units between the first time unit and the third time unit, T is a positive integer, and T is less than or equal to a second threshold, where the second threshold is preset by a communication protocol Is defined, or the second threshold is indicated by a network device.

Optionally, the uplink channel includes a demodulation reference signal DMRS, and the demodulation of the uplink channel is performed based on the SRS and the DMRS.

Optionally, the SRS is located in a first time unit, and the DMRS is located in a second time unit, wherein the first time unit and the second time unit are adjacent time units, or the first time unit The K time units between the unit and the second time unit, K is a positive integer, and K is less than or equal to a first threshold, where the first threshold is predefined by a communication protocol, or the first The threshold is indicated by the network device.

Optionally, the SRS is also used to perform channel estimation on the uplink channel.

Optionally, the transmission parameters of the SRS and the uplink channel are the same, and the transmission parameters include at least one of the following parameters: transmission power, antenna port, precoding matrix, and frequency domain resources.

Optionally, the uplink channel includes at least one of the uplink shared channel PUSCH and the uplink control channel PUCCH.

In a fifth aspect, a wireless communication device is provided, which includes various modules or units for executing the method in the first aspect or any one of the possible implementation manners of the first aspect.

In a sixth aspect, a wireless communication device is provided, including various modules or units for executing the second aspect or the method in any one of the possible implementation manners of the second aspect.

In a seventh aspect, a communication device is provided, including a processor, where the processor is coupled with a memory and can be used to execute the first aspect or the method in any one of the possible implementation manners of the first aspect. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled with the communication interface. Optionally, the communication device further includes a communication interface, and the processor is coupled with the communication interface.

In one implementation, the communication device is a network device. When the communication device is a network device, the communication interface may be a transceiver or an input/output interface.

In another implementation manner, the communication device is a chip or a chip system. When the communication device is a chip or a chip system, the communication interface may be an input/output interface, interface circuit, output circuit, input circuit, pin or related circuit on the chip or chip system. The processor may also be embodied as a processing circuit or a logic circuit.

In an eighth aspect, a communication device is provided, including a processor. The processor is coupled with the memory and can be used to execute instructions in the memory to implement the foregoing second aspect or the method in any one of the possible implementation manners of the second aspect. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled with the communication interface. Optionally, the transceiver may be a transceiver circuit. Optionally, the input/output interface may be an input/output circuit.

In one implementation, the communication device is a terminal device. When the communication device is a terminal device, the communication interface may be a transceiver, or an input/output interface. Optionally, the transceiver may be a transceiver circuit. Optionally, the input/output interface may be an input/output circuit.

In another implementation manner, the communication device is a chip or a chip system. When the communication device is a chip or a chip system, the communication interface may be an input/output interface, interface circuit, output circuit, input circuit, pin or related circuit on the chip or chip system. The processor may also be embodied as a processing circuit or a logic circuit.

In a ninth aspect, a processor is provided, including: an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that any one of the first aspect to the fourth aspect, and any one of the first aspect to the fourth aspect The methods in one possible implementation are implemented.

In the specific implementation process, the above-mentioned processor may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, and various logic circuits. The input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit may be, for example, but not limited to, output to the transmitter and transmitted by the transmitter, and the input circuit and output The circuit can be the same circuit, which is used as an input circuit and an output circuit at different times. The embodiments of the present application do not limit the specific implementation manners of the processor and various circuits.

In a tenth aspect, a processing device is provided, including a processor and a memory. The processor is used to read instructions stored in the memory, receive signals through a receiver, and transmit signals through a transmitter to execute any one of the first aspect to the fourth aspect and any one of the first aspect to the fourth aspect. Methods.

Optionally, there are one or more processors, and one or more memories.

Optionally, the memory may be integrated with the processor, or the memory and the processor may be provided separately.

In the specific implementation process, the memory can be a non-transitory (non-transitory) memory, such as a read only memory (ROM), which can be integrated with the processor on the same chip, or can be set in different On the chip, the embodiment of the present application does not limit the type of the memory and the setting mode of the memory and the processor.

It should be understood that the related data interaction process, for example, sending instruction information may be a process of outputting instruction information from the processor, and receiving capability information may be a process of receiving input capability information by the processor. Specifically, the processed output data may be output to the transmitter, and the input data received by the processor may come from the receiver. Among them, the transmitter and receiver can be collectively referred to as a transceiver.

The processor in the above tenth aspect may be a chip, and the processor may be implemented by hardware or software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc.; when implemented by software When implemented, the processor may be a general-purpose processor, which is implemented by reading software codes stored in the memory. The memory may be integrated in the processor, may be located outside the processor, and exist independently.

In an eleventh aspect, a computer program product is provided. The computer program product includes: a computer program (also called code, or instruction), which when the computer program is executed, causes a computer to execute the first aspect to The fourth aspect and the method in any one of the possible implementation manners of the first to fourth aspects.

In a twelfth aspect, a computer-readable medium is provided, and the computer-readable medium stores a computer program (also called code, or instruction) when it runs on a computer, so that the computer executes the above-mentioned first aspect to The fourth aspect and the method in any one of the possible implementation manners of the first to fourth aspects.

In a thirteenth aspect, a communication system is provided, including the aforementioned network equipment and terminal equipment.

Description of the drawings

Figure 1 is an application scenario of an embodiment of the present application;

Figure 2 is a schematic diagram of a wireless communication process according to an embodiment of the present application;

FIG. 3 is another schematic diagram of a wireless communication process according to an embodiment of the present application;

FIG. 4 is a schematic block diagram of a wireless communication device according to an embodiment of the present application;

FIG. 5 is another schematic block diagram of a wireless communication device according to an embodiment of the present application;

FIG. 6 is a schematic block diagram of a terminal device according to an embodiment of the present application;

Fig. 7 is a schematic block diagram of a network device according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings.

The technical solutions of the embodiments of this application can be applied to various communication systems, such as: Global System of Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, and Wideband Code Division Multiple Access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, the future fifth generation (5th Generation, 5G) system or New Radio (NR), etc.

The terminal equipment in the embodiments of this application may refer to user equipment, access terminals, user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication equipment, user agents, or User device. The terminal device can also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), and wireless communication. Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network or future evolution of the public land mobile network (Public Land Mobile Network, PLMN) Terminal equipment, etc., this embodiment of the present application is not limited thereto.

The network device in the embodiment of the application may be a device used to communicate with terminal devices. The network device may be a Global System of Mobile Communication (GSM) system or Code Division Multiple Access (CDMA) The base station (Base Transceiver Station, BTS) in the LTE system can also be the base station (NodeB, NB) in the Wideband Code Division Multiple Access (WCDMA) system, or the evolved base station (Evolutional Base Station) in the LTE system. NodeB, eNB or eNodeB), it can also be a wireless controller in the cloud radio access network (Cloud Radio Access Network, CRAN) scenario, or the network device can be a relay station, an access point, a vehicle-mounted device, a wearable device, and the future The network equipment in the 5G network or the network equipment in the future evolved PLMN network, etc., are not limited in the embodiment of the present application.

In order to facilitate the understanding of the embodiments of the present application, a communication system applicable to the embodiments of the present application is first described in detail with reference to FIG. 1. FIG. 1 is a schematic diagram of a communication system 100 applicable to the method for sending and receiving a reference signal according to an embodiment of the present application. As shown in FIG. 1, the communication system 100 may include a network device 102 and terminal devices 104-114.

It should be understood that the network device 102 can be any device with a wireless transceiver function or a chip that can be installed in the device, and the device includes but is not limited to: base station (for example, base station NodeB, evolved base station eNodeB, fifth generation ( 5G) Network equipment in communication systems (such as transmission point (TP), transmission reception point (TRP), base station, small cell equipment, etc.), network equipment in future communication systems, wireless fidelity ( Wireless-Fidelity (WiFi) system access node, wireless relay node, wireless backhaul node, etc.

The network device 102 can communicate with multiple terminal devices (for example, the terminal devices 104-114 shown in the figure).

It should be understood that terminal equipment may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal, wireless communication Equipment, user agent, or user device. The terminal device in the embodiments of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, and an augmented reality (Augmented Reality, AR) terminal Equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation safety ( The wireless terminal in transportation safety, the wireless terminal in the smart city, the wireless terminal in the smart home, and so on. The embodiments of this application do not limit the application scenarios. In the embodiments of the present application, the aforementioned terminal device and the chips that can be installed in the aforementioned terminal device are collectively referred to as terminal devices.

In addition, the communication system 100 may also be a public land mobile network (PLMN) network, a device to device (D2D) network, a machine to machine (M2M) network or other networks. FIG. 1 is only a simplified schematic diagram of an example for ease of understanding. The communication system 100 may also include other network devices and terminal devices, which are not shown in FIG. 1.

To facilitate understanding of the embodiments of the present application, the following briefly introduces data demodulation during uplink transmission.

1. Reference signal

The New Radio Access Technology (NR) protocol defines two types of uplink reference signals, for example, demodulation reference signal (DMRS) and sounding reference signal (Sounding Reference Signal, SRS). DMRS and Physical Uplink Shared Channel (PUSCH) can multiplex different subcarriers in the same time unit, and use the same precoding and power control as PUSCH, so the receiver (for example, the base station during uplink transmission) The PUSCH channel can be estimated based on the DMRS, and the signal carried in the PUSCH can be demodulated.

SRS is mainly used for the network side to estimate the channel quality of the uplink transmission channel (when the uplink and downlink channels are reciprocal, it is also used to estimate the downlink channel), and to configure the scheduling information of the uplink transmission reasonably, such as modulation and coding strategy (Modulation and Coding). Coding Scheme, MCS), the precoding used in the uplink PUSCH, the closed-loop adjustment of power control, etc. In non-codebook transmission, the network device can configure a terminal device with an SRS resource set for uplink channel state information (CSI) acquisition, including up to 4 SRS resources, and each SRS resource corresponds to a different SRS port . An SRS resource includes the resource allocation of the SRS in the time domain. The SRS in NR is located in the last 6 time domain symbols of a time slot, and the configured SRS resource can only occupy continuous time domain symbols in the time domain. In the frequency domain, SRS can perform frequency hopping of different symbols in a time slot and frequency hopping between time slots to obtain a larger detection bandwidth, especially when the fading channel is frequency-selectively fading in a mobile scenario, it can perform frequency selective scheduling.

2. Channel estimation and data transmission

Channel estimation is the process of estimating the model parameters of the channel model from the received data. Through channel estimation, the receiving device (which may be a network device or a terminal device) can obtain the impulse response of the channel, so as to provide the required CSI for subsequent coherent demodulation.

Exemplarily, when performing downlink channel state estimation in non-codebook transmission, first, the network device will configure a non-zero power channel state information reference signal (Channel State Information Reference Signal, CSI-RS) related to SRS resources. It is used for terminal equipment to measure downlink channel state information, which may include channel quality indicator, reference signal received power, etc., and when uplink and downlink channel reciprocity, determine the non-codebook precoding of SRS uplink transmission. In addition, the terminal device also calculates the open-loop loss of signal transmission based on the CSI-RS, and receives the closed-loop power control indication in the Downlink Channel Information (DCI), determines the transmit power of the uplink SRS, and then uses the corresponding SRS The port sends the non-codebook precoded SRS.

Secondly, after receiving the uplink non-codebook SRS, the network equipment estimates the uplink transmission channel, and determines the PUSCH transmission parameters based on the estimated uplink channel quality, such as MCS, Sounding Resource Indication (SRI) ), etc., where MCS is the modulation order and code rate used in PUSCH transmission, that is, when the channel quality is good, the higher modulation order and code rate are used to increase the transmission code rate; and when the channel quality is poor, Use lower modulation order and code rate to ensure lower block error rate. SRI is used to indicate the beam direction and the number of transmission data streams that the terminal should use during PUSCH transmission. That is, when the network side receives multiple SRS beams in different directions, it will select the stronger SRS direction and determine the flow of PUSCH transmission. The number (corresponding to the number of selected SRS beam directions) indicates the transmission of the terminal PUSCH in the better beam direction in the form of the SRI field in the DCI.

Finally, the terminal device transmits the PUSCH on the corresponding SRS port by detecting the value of the relevant field for PUSCH transmission in the DCI.

3. Data demodulation

In uplink transmission, DMRS is used for network equipment to perform channel estimation on the PUSCH channel, and then demodulate the data carried on the PUSCH.

Generally, DMRS can occupy up to 4 time-domain symbols, and there are two configuration methods as follows:

method one:

Each DMRS occupies 1 time domain symbol, and the network device can configure up to 4 such DMRS. Generally, the first DMRS is called a pre-DMRS, the subsequent DMRS is called an additional DMRS, and the number of additional DMRS (0, 1, 2, 3) is configured through RRC signaling.

Way two:

Each DMRS occupies two consecutive time-domain symbols, and a network device can configure up to two such DMRS, that is, a DMRS occupies up to four time-domain symbols. Similarly, the DMRS of the first group of 2 consecutive time domain symbols is called the pre-DMRS, and the DMRS of the subsequent 2 consecutive time domain symbols is called the additional DMRS. The number of additional DMRS (0, 1) is configured through RRC signaling. .

Which DMRS method to use above is determined by the parameters dmrs maxlength and DCI in RRC signaling. When dmrs maxlength=1, only mode 1 DMRS configuration can be used, that is, each DMRS can only occupy 1 Time domain symbol; when dmrs maxlength=2, the DMRS configuration of method 1 or 2 can be used, which method is used for configuration through the relevant field in the DCI.

4. Transmission power parameters

In the uplink transmission, power control is very important for the transmission of the uplink reference signal. When the channel quality of the uplink transmission is poor, for example, the long distance of the terminal equipment for uplink propagation causes a large path loss, or the network equipment receives the uplink reference signal. At this time, the interference is large. At this time, the network device needs to instruct (hereinafter, also referred to as configuration) the terminal device to perform uplink transmission with a higher uplink reference signal power in order to effectively receive the uplink reference signal.

Generally, when a network device performs power control of an uplink reference signal, it needs to satisfy the following formula:

P=min{P _cmax ,{P ₀ (j)+α(j)*P _L (p)}+{f(l)}+{10lg M+Δ}}

Among them, {P ₀ (j)+α(j)*P _L (p)} is the open-loop operating point, {f(l)} is the closed-loop offset, {10lg M+Δ} is other adjustments. Generally, the open-loop operating point is configured through high-level signaling. The high-level signaling can be RRC signaling and is applicable to multiple time units. The closed-loop offset is configured through Downlink Control Information (DCI). To quickly adjust the power of the uplink reference signal. In the other adjustments, M represents the number of physical resource blocks PRB occupied by this uplink transmission. At this time, the default uplink reference signal is a subcarrier interval of 15KHz. The open-loop operating point includes the path loss information obtained after the terminal device performs channel estimation on the downlink reference signal sent by the network device, the network device performs power compensation on the path loss value, and performs slow and semi-static power adjustment; closed-loop offset For network equipment to quickly and accurately adjust based on the quality of the upstream signal received during the last transmission, for example, when the upstream transmission power received by the network equipment last time is too small, the network equipment can adjust the amount through a closed loop to indicate that the terminal equipment is in This uplink transmission performs higher power transmission.

Exemplarily, when the uplink reference signal is SRS, the P _L (p) in the open-loop operating point is the path loss estimation of the open-loop operating point. Generally, the value of p is configured through the high-level parameter pathlossReferenceSignal, and the index is indexed to the relevant When the high-level parameters are not configured (for example, the terminal device has not been connected to the system), the terminal device directly uses the reference signal in the synchronization signal block to calculate the path loss.

Exemplarily, when the uplink reference is DMRS, the _PL (p) of the open-loop operating point, that is, the path loss estimation of the open-loop operating point, is configured as follows: when the terminal device is not configured with the high-level parameter pathlossReferenceSignal, the terminal device is based on The reference signal in the synchronization signal block is calculated for path loss; when the terminal device is configured with the high-level parameter pathlossReferenceSignal, it is directly indexed to the specific reference signal through the high-level parameter pusch-pathlossReferenceSignal-Id to calculate the path loss; when the PUSCH is transmitted in msg3, The terminal device uses the same reference signal sent by PRACH to calculate the path loss; when the terminal device is configured with the high-level parameter SRI-PUSCH-PowerControl and multiple pusch-pathlossReferenceSignal-Id values, it needs to use the mapping relationship between the SRI in the DCI and the configuration , Index to the corresponding downlink reference signal, and calculate the path loss.

For non-codebook PUSCH/DMRS transmission, the terminal device needs to select at least one antenna port for PUSCH transmission according to the number of layers of data to be transmitted and the number of SRS resources configured by the network device through the SRI index, and according to the path loss of the antenna port Take the value to calculate the path loss. As shown in Table 1, taking the number of transmission layers as 1, and the format of DCI as 0_1 as an example, the terminal device determines the antenna port for transmitting PUSCH/DMRS through the index table. For example, when N _SRS =2, the terminal device can transmit PUSCH/DMRS through two antenna ports. And the network device can use the SRI index value to instruct the terminal device to send PUSCH/DMRS from a certain antenna port. When the SRI index value is 0, the terminal device uses the antenna port corresponding to the first SRS resource (SRS resource 0) When sending PUSCH/DMRS, correspondingly, the terminal equipment uses the path loss of the first antenna port to calculate the path loss; when the SRI index value is 1, the terminal equipment corresponds to the second SRS resource (SRS resource 1) The antenna port sends PUSCH/DMRS, correspondingly, the terminal equipment uses the path loss of the second antenna port to calculate the path loss.

Table 1 Non-codebook PUSCH/DMRS transmission SRI index table (number of transmission layers = 1)

SRI index value	SRI, N SRS = 2	SRI index value	SRI, N SRS = 3	SRI index value	SRI, N SRS = 4
0	0	0	0	0	0
1	1	1	1	1	1
To	To	2	2	2	2
To	To	3	Reserved	3	3

For the power adjustment of the closed-loop offset, when the network device finds that the power of the uplink signal transmitted by the terminal device in a certain time unit is too high, the network device exemplarily informs the terminal device of the same type of uplink signal transmission by using DCI. The transmitted uplink signal power is reduced by 1 dB, and the information in the DCI used to notify the terminal device to quickly adjust the power is called a transmission power control command (Transmission Power Control Command, TPC-command). Generally, TPC-command has 2 bits. For example, when this field is 00 and the value of TPC-Accumulation in higher layer signaling is 1, that is, TPC-Accumulation is enabled, the terminal device will Reduce the power by 1dB based on the closed-loop adjustment of the same type of transmission. The value of TPC-Accumulation is 0, that is, when TPC-Accumulation is not enabled, the closed-loop adjustment of the terminal device in the current time unit is reduced by 4dB; similarly, when the field is At 01, 10, and 11, the value of the closed-loop power adjustment is different.

_{Usually P 0} (j) and α(j) are configured in pairs in open-loop parameters, and 32 sets can be configured in total, which are included in the P0-PUSCH-AlphaSet parameters of high-level signaling. The parameters of P ₀ (j) and α(j) The value is selected from the configured P0-PUSCH-AlphaSet through the p0-PUSCH-AlphaSetId index. _{The terminal equipment performs downlink path loss estimation based on the index value in the path loss estimate P L} (p) of the open loop operating point. The path loss estimate of the downlink transmission is the uplink path loss estimate of the current time unit and is related to the path loss estimate The parameter of is the PUSCH-PathlossReferenceRS. Illustratively, the terminal device learns the value of p from the PUSCH-PathlossReferenceRS-Id in the SRI-PUSCH-PowerControl, and performs path loss measurement on the reference signal with the index value of p.

The value of tpc-Accumulation in the high-level parameters determines the closed-loop power parameter {f(l)}. For example, when tpc-Accumulation is enabled, it is 1, if the index value of the open-loop operating point part of the parameter j= 1. The high-level parameter powerControlLoopToUse is used to indicate the value of {f(l)}. When tpc-Accumulation is not enabled, that is, when it is 0, the value of {f(l)} is obtained through the instruction of TPC-command.

In addition to the transmit power, the NR also configures the time-frequency resource of the uplink reference signal through high-level signaling, that is, the terminal device determines the time-frequency resource of the uplink reference signal through the configuration values of different fields in the high-level signaling. The time-frequency resource refers to the distribution of time-domain resources and frequency-domain resources within a unit of time. The frequency-domain resource distribution can be determined by the start position of the frequency-domain resource, the offset of frequency-domain subcarriers, and the frequency-domain sequence. The offset of the frequency domain sequence is determined by parameters such as frequency hopping. The distribution of time domain resources can be determined by parameters such as the starting position of the time domain symbols and the number of time domain symbols.

Generally, the fields in high-level signaling are: nrofSymbols, the number of real-time domain symbols, the upper reference signal is SRS as an example, the number of time-domain symbols occupied in each time unit can be 1, 2, or 4, startPosition , The starting position of the real-time domain symbol, freqDomainPosition, the position of the frequency domain symbol, freqDomainShift, the subcarrier offset in the frequency domain, transmissionComb, the offset value of the frequency domain sequence, resourceType, the type of uplink reference signal resource configuration It can be periodic, non-periodic, or semi-persistent, groupOrSequenceHopping, that is, the mode of uplink reference signal frequency hopping, which can be non-frequency hopping, or frequency hopping in time domain order.

5. Antenna parameters

When the terminal device sends the PUSCH to the network device, the network device may determine the antenna port through which the terminal device sends the PUSCH after receiving the SRS sent by different ports. Exemplarily, after receiving 4 different SRS ports, the network device determines the number of parallel data streams transmitted by the terminal device by detecting the received signal power of the 4 SRS and comprehensively considering the uplink interference of other terminal devices. , And select the corresponding number of SRS resources from the 4 SRS beam directions. For example, the network device instructs the terminal device to select the beams corresponding to SRS=2 and 3 by indicating the SRI index value to 9 to perform PUSCH transmission of two data streams .

6. Time-frequency resources

In the embodiments of the present application, data or information may be carried by time-frequency resources, where the time-frequency resources may include resources in the time domain and resources in the frequency domain. Wherein, in the time domain, the time-frequency resource may include one or more time domain units (or, it may also be referred to as a time unit), and in the frequency domain, the time-frequency resource may include frequency domain units.

Among them, a time domain unit (also called a time unit) can be a symbol or several symbols, or a mini-slot, or a slot, or a subframe, Among them, the duration of a subframe in the time domain can be 1 millisecond (ms), a slot consists of 7 or 14 symbols, and a mini slot can include at least one symbol (for example, 2 symbols or 7 symbols). Symbol or 14 symbols, or any number of symbols less than or equal to 14 symbols). The above-mentioned time-domain unit sizes are only for the convenience of understanding the solutions of the embodiments of the present application, and should not be understood as limiting the present invention. It should be understood that the above-mentioned time-domain unit sizes may be other values, which are not limited in the embodiments of the present application.

A frequency domain unit may be a resource block (resource block, RB), or a resource block group (resource block group, RBG), or a predefined subband (subband).

The above introduces related concepts about uplink data demodulation, and the technical solution for uplink data demodulation provided by the embodiment of the present application will be described in detail below with reference to FIG. 2.

S201: The terminal device sends an SRS to the network device.

Wherein, the terminal device may send the SRS periodically.

Alternatively, the terminal device may send the SRS aperiodicly, that is, the terminal device may send the SRS after receiving the indication information of the network device.

In this application, the SRS may be an SRS used for channel sounding. In addition to being used for channel sounding, the SRS is also used for demodulating information carried by the uplink channel.

For example, after receiving the SRS, the network device detects the channel quality of the uplink channel, and considers the interference of the uplink transmission to determine the scheduling parameters of the PUSCH transmission of the terminal device. For example, the scheduling parameters may include, but are not limited to, modulation and coding strategies (Modulation and Coding Strategies). and Coding Scheme, MCS) or resource allocation and other information, and send the above scheduling parameters to the terminal through the Physical Downlink Control Channel (PDCCH); the terminal equipment according to the Downlink Control Information (DCI) carried in the PDCCH Indicates that the uplink channel is transmitted; after receiving the uplink channel, the network device performs joint channel estimation according to the SRS and the DMRS in the uplink channel, and demodulates the information carried in the uplink channel.

It should be noted that the uplink channel may include PUSCH.

Alternatively, the uplink channel may also include PUCCH.

Alternatively, the uplink channel may include both PUCCH and PUSCH.

Optionally, the network device may send instruction information to the terminal device, and the instruction information may be used to indicate that the SRS can be used for demodulation, so that the terminal device may send the SRS for the network device to demodulate the uplink channel according to the instruction information. Wherein, the indication message may be high-level signaling, or the indication information may also be carried in Downlink Control Information (DCI). For example, one may be added to the existing indication information to carry the above indication information. Fields, or redundant fields in DCI may also be used to carry the indication information, which is not particularly limited in the embodiment of the present application.

Optionally, in this embodiment of the present application, the uplink channel used by the SRS for demodulation may be the uplink channel in the first time unit or the second time unit.

For example, when the SRS is carried in the first time unit, the uplink channel used for demodulation of the SRS may be the uplink channel carried on the first time unit, or the uplink channel used for demodulation of the SRS may be the second time unit. Uplink channel carried on the unit.

Wherein, the second time unit may be the first time unit after the first time unit.

Alternatively, the second time unit may be the T-th time unit after the first time unit, where the value of T may be a value preset by a terminal device or a network device, or the value of T may also be notified by a network device For terminal equipment.

Optionally, in this embodiment of the present application, the uplink channel used by the SRS for demodulation may be an uplink channel within a period of time. Among them, a period of time may include one or more time units.

For example, when the SRS is carried in the first time unit, the uplink channel used for demodulation of the SRS may be the uplink channel within N time units starting from the first time unit, or the uplink channel used for demodulation of the SRS It may be an uplink channel within N time units starting from the second time unit.

Optionally, the value of N may be a value preset by the terminal device or the network device, or the value of N may also be notified to the terminal device by the network device.

Wherein, the second time unit may be the first time unit after the first time unit.

Alternatively, the second time unit may be the T-th time unit after the first time unit, where the value of T may be a value preset by a terminal device or a network device, or the value of T may also be notified by a network device For terminal equipment.

S202: The terminal device sends an uplink channel to the network device.

Optionally, in order to ensure the performance of the demodulation of the uplink channel based on the SRS, in the embodiment of the present application, the transmission parameters of the uplink channel can be made the same as the transmission parameters of the SRS, so that the SRS and the uplink channel have the same or similar channels. State, in other words, so that the SRS and the uplink channel experience the same or similar spatial fading.

Wherein, the transmission parameter may include at least one of transmission power, antenna port, precoding matrix, or frequency domain resources.

For example, the transmission power of the uplink channel is the same as the transmission power of the SRS (i.e., condition 1).

For another example, the antenna port of the uplink channel is the same as the antenna port of the SRS (ie, condition 2).

For another example, the precoding matrix of the uplink channel is the same as the precoding matrix of the SRS (ie, condition 3).

For another example, the frequency domain resource of the uplink channel is the same as the frequency domain resource of the SRS (ie, condition 4).

That is, the transmission parameters of the uplink channel and the transmission parameters of the SRS may satisfy at least one of the aforementioned conditions 1 to 4.

For example, the transmission parameters of the uplink channel and the transmission parameters of the SRS can meet the above conditions 1 and 2, or both the above conditions 1 and 3, or both the above conditions 1 and 4, or the above conditions 2 and 3, or both Satisfy the above conditions 2 and 4, or meet the above conditions 3 and 4 at the same time, or meet the above conditions 1, 2 and 3 at the same time, or meet the above conditions 1, 2 and 4 at the same time, or meet the above conditions 1, 3 and 4 at the same time, or The above conditions 2, 3, and 4 are met at the same time, or the above conditions 1, 2, 3, and 4 are met at the same time.

In addition, in the embodiment of the present application, the network device may also indicate to the terminal device the sending parameters of the uplink channel demodulated using SRS. For example, the network device may indicate to the terminal device the sending parameters corresponding to the above-mentioned second time unit, thereby ensuring The transmission parameters of the uplink channel demodulated using SRS are the same as the transmission parameters of SRS. For example, the transmission parameters of the uplink channel demodulated using SRS may be indicated through high-level signaling, or the network equipment may also indicate the transmission parameters of the uplink channel demodulated using SRS through DCI.

S203. The network device demodulates the uplink channel (that is, the uplink channel carried on the second time unit) according to the SRS

It should be noted that the network device can demodulate the uplink channel only according to the SRS.

Alternatively, the network device may also demodulate the uplink channel jointly (or jointly) based on both the SRS and the DMRS included in the uplink channel.

In addition, the network equipment can also perform channel estimation on the uplink channel based on the SRS, and then demodulate the uplink channel.

Alternatively, the network device may also perform channel estimation on the uplink channel based on the SRS and the DMRS contained in the uplink channel, and then demodulate the uplink channel based on the channel estimation and the above two reference signals.

Compared with the prior art that only demodulates the uplink channel based on the DMRS in the uplink channel, the uplink transmission method provided by the embodiment of the present application uses SRS to demodulate the uplink channel, which can increase the overhead of the DMRS in the uplink channel without increasing the overhead of the DMRS in the uplink channel. The demodulation performance of network equipment is improved, and the efficiency of uplink transmission in the wireless communication process is improved. In addition, the network equipment can also perform more accurate channel estimation on the PUSCH channel according to SRS, thereby demodulating the uplink channel more accurately, and improving the resolution of network equipment. Accuracy of tuning.

In the following, with reference to FIG. 3, an example in which the upstream channel is PUSCH is used as an example to specifically introduce the implementation process of the embodiment of this application.

S301. The network device sends instruction information to the terminal device, indicating that the SRS is used for PUSCH demodulation.

Specifically, the indication information may be used to instruct the terminal device to send the SRS and PUSCH, and the SRS is used to demodulate the data of the PUSCH sent by the terminal device.

Exemplarily, the period of the SRS may be configured by the network device as 5 time units, that is, the SRS is used to demodulate PUSCH data in the second to fifth time units after the time unit carrying the SRS.

Exemplarily, the network device may add a field, such as a bit, in the information element of the SRS resource configured by the RRC signaling in the high-level signaling, for example, to indicate the function of the SRS, that is, the SRS is used for Demodulate PUSCH data; it can also be in high-level signaling, for example, a value can be added to the information element related to SRS resources in RRC signaling to indicate the function of SRS, that is, SRS is used to demodulate PUSCH For example, a value of srs_function_dmrs can be added to SRS-ResourceSet::usage, that is, SRS-ResourceSet::usage={codebook, noncodebook, beammanagement, antenne switching, srs_function_dmrs}.

S302. The terminal device sends an SRS to the network device.

Specifically, when the terminal device receives the above indication information, it sends an SRS for demodulating the PUSCH. Illustratively, the terminal device sends the SRS at its corresponding antenna port according to the SRS resource configured by the network device. The network device can configure the terminal device to use 1 SRS resource, or use 2 SRS resources, or use 4 SRS resources. Generally, the network device can only configure SRS resources in the last 6 time domain symbols of a time slot. , And the SRS resource occupies consecutive time-domain symbols in the time domain. SRS can select different frequencies in the frequency domain to obtain a larger detection bandwidth.

In non-codebook transmission, the terminal device measures the downlink channel according to the downlink reference signal sent by the network device, determines the precoding of the uplink transmission SRS according to the measured value of the downlink channel, and finally sends the precoded SRS.

S303. The network device sends an SRI to the terminal device, where the SRI is used to indicate the sending port of the PUSCH

Specifically, after the network device receives the SRS sent by the terminal device, it detects the received power of all the received SRS and comprehensively considers the uplink interference of other terminal devices to determine the number of parallel data streams transmitted by the terminal device. And select the PUSCH spatial resources from the SRS beam direction, that is, the PUSCH transmission port.

Exemplarily, in non-codebook transmission, the network device may indicate the port used by the terminal device to send the PUSCH through the index value of the SRI.

S304. The terminal device determines PUSCH transmission parameters, for example, transmission power, precoding matrix, or frequency domain resources.

In the embodiment of the present application, the transmission parameter (for example, transmission power) of the terminal device sending PUSCH directly adopts the above-mentioned transmission parameter (for example, transmission power) of the SRS, so as to ensure that the terminal device will not cause randomness due to power changes during uplink transmission. Phase hopping, and the PUSCH uses the same frequency domain resources as the above-mentioned SRS to ensure that the channel experienced by SRS transmission is exactly the same as the channel experienced by PUSCH transmission.

It should be noted that in non-codebook transmission, the PUSCH indicated by the SRI is sent, and the PUSCH is precoded using the same precoding matrix as the above-mentioned SRS.

According to the above parameters, the terminal device sends the PUSCH.

S305. The terminal device uses the foregoing sending parameters to send the PUSCH.

Wherein, the specific implementation of this step may be the same as or similar to the above S202, and will not be repeated here. It should be noted that part of the time unit in the PUSCH sent by the terminal device may not include the DMRS for the demodulated PUSCH data. The time unit can be a time domain symbol, a time slot, or a sub-slot.

S306. The network device demodulates the information carried by the PUSCH according to the SRS.

Specifically, the network device receives the SRS in the first time unit and receives the PUSCH in the subsequent adjacent time units. At this time, the network device can demodulate the PUSCH data according to the SRS.

Optionally, the network device may also use the above-mentioned SRS and the DMRS in the PUSCH at the same time to jointly demodulate the data in the PUSCH.

Exemplarily, according to SRS and DMRS, demodulate the information carried by PUSCH, which may be:

The network equipment performs channel estimation on the PUSCH channel received in the second to fifth time units based on the SRS received in the first time unit, and then performs channel estimation on the channels received in the second to fifth time units according to the channel estimation The data demodulation of the PUSCH; it can also be that the network equipment jointly combines the PUSCH channel based on the SRS received in the first time unit and the DMRS contained in the PUSCH received in the second to fifth time units Channel estimation, and then perform data demodulation on the PUSCH received from the second to fifth time units according to the channel estimation, which is not specifically limited in the embodiment of the present application.

It should be noted that when the SRS of the first time unit has the same transmission parameters as the PUSCH of the unit, the network device may also perform data demodulation on the PUSCH in the time unit according to the SRS.

The embodiments of the present application can reuse the existing SRS without increasing the pilot overhead of the DMRS, assist the network equipment in the PUSCH data demodulation and/or channel estimation, and improve the transmission efficiency of the PUSCH.

In addition, when the uplink channel is PUCCH, the specific steps are as follows:

1. When the network side configures the high-level signaling parameter PUCCH-Spatialrelationinfo to be srs, it instructs the terminal to use the same Spatialrelationinfo as the SRS when sending PUCCH, that is, the same transmission port. Therefore, PUCCH and SRS experience exactly the same spatial fading.

2. When the terminal device receives the value of the high-level parameter PUCCH-Spatialrelationinfo configured on the network side as srs, it uses the complete configuration of the sent SRS to send the PUCCH, and the configuration includes the transmission port, power, and resources.

3. After receiving the SRS and PUCCH, the network side device performs joint channel estimation and demodulation on the PUCCH according to the DMRS in the SRS and PUCCH. Alternatively, the network device can also perform channel estimation and demodulation on the PUCCH only based on the SRS.

In addition, other steps and processing procedures may be similar to the case where the uplink channel is the PUSCH. Here, in order to avoid redundant description, detailed descriptions are omitted.

In addition, when the uplink channels are PUCCH and PUSCH, the specific steps are as follows:

a. The network side configures the high-level signaling parameter PUCCH-Spatialrelationinfo to be srs, which instructs the terminal to use the same port as the SRS (equivalent to precoding) for PUCCH transmission; the network side configures SRS-ResourceSet::usage to be noncodebook , Instruct the terminal to use the same precoding as the SRS for PUSCH transmission;

b. After receiving the above-mentioned high-level signaling configuration, the terminal device knows that the DMRS of PUCCH, the DMRS of PUSCH, and the SRS need to perform joint channel estimation, so it will send PUCCH and PUSCH with the same transmission power, antenna port, and frequency domain resources. .

c. After receiving PUCCH and PUSCH, the network side will perform joint channel estimation and demodulate PUCCH and PUSCH based on the DMRS of PUCCH, the DMRS of PUSCH and the previously received SRS. Alternatively, the network device may also perform channel estimation and demodulation on the PUCCH and/or PUSCH only according to the SRS. Alternatively, the network device may also perform channel estimation and demodulation on the PUSCH according to the DMRS in the SRS and the PUCCH. Alternatively, the network device may also perform channel estimation and demodulation on the PUCCH according to the DMRS in the SRS and the PUSCH. Alternatively, the network device may also perform channel estimation and demodulation on the PUSCH according to the DMRS in the SRS and the PUSCH. Alternatively, the network device may also perform channel estimation and demodulation on the PUCCH according to the DMRS in the SRS and the PUCCH.

In addition, other steps and processing procedures may be similar to the case where the uplink channel is the PUSCH. Here, in order to avoid redundant description, detailed descriptions are omitted.

Fig. 4 is a schematic block diagram of an uplink channel demodulation apparatus provided by an embodiment of the present application. The device 400 includes a transceiver unit 410 and a processing unit 420. The transceiver unit 410 can communicate with the outside, and the processing unit 420 is used for data processing. The transceiving unit 410 may also be referred to as a communication interface or a communication unit.

Optionally, the device 400 may further include a storage unit, and the storage unit may be used to store instructions and/or data, and the processing unit 420 may read the instructions and/or data in the storage unit.

The device 400 can be used to perform the actions performed by the network device in the above method embodiment. At this time, the device 400 can be a network device or a component configurable in the network device, and the transceiver unit 410 is used to perform the above method embodiment. The processing unit 420 is configured to perform the processing-related operations on the network device side in the above method embodiment for the operations related to receiving and sending on the network device side.

Alternatively, the device 400 may be used to perform the actions performed by the terminal device in the above method embodiment. At this time, the device 400 may be a terminal device or a component configurable in the terminal device, and the transceiver unit 410 is used to perform the above method. In the embodiment, the processing unit 420 is configured to perform the processing-related operations on the terminal device side in the above method embodiment for the operations related to receiving and sending on the terminal device side.

As a design, the device 400 is used to perform the actions of the network device in the embodiment shown in FIG. 2 or FIG. 3, and the transceiver unit 410 is used to receive the sounding reference signal SRS sent by the terminal device, and is used to receive the SRS sent by the terminal device. Uplink channel; the processing unit 420 is configured to use the SRS to demodulate the information carried by the uplink channel.

As another design, the apparatus 400 is used to perform the actions of the terminal device in the embodiment shown in FIG. 2 or FIG. 3, and the transceiver unit 410 is used to send the sounding reference signal SRS to the network device, and is used to send the sounding reference signal SRS to the network device. Send an uplink channel; wherein, the SRS is used for demodulation of the uplink channel.

Optionally, the uplink channel includes a demodulation reference signal DMRS, and the demodulation of the uplink channel is performed based on the SRS and the DMRS.

Optionally, the SRS is located in a first time unit, and the DMRS is located in a second time unit, where:

The first time unit and the second time unit are adjacent time units, or

K time units between the first time unit and the second time unit, K is a positive integer, and K is less than or equal to a first threshold, where the first threshold is predefined by a communication protocol, Or the first threshold is indicated by the network device.

Optionally, the SRS is also used to perform channel estimation on the uplink channel.

Optionally, the sending parameters of the SRS and the uplink channel are the same, and the sending parameters include at least one of the following parameters:

Transmission power, antenna port, precoding matrix, frequency domain resources.

Optionally, the uplink channel includes at least one of the uplink shared channel PUSCH and the uplink control channel PUCCH.

As shown in FIG. 5, an embodiment of the present application also provides a communication device 500. The communication device 500 includes a processor 510, which is coupled to a memory 520. The memory 520 is used to store computer programs or instructions or and/or data, and the processor 510 is used to execute the computer programs or instructions and/or data stored in the memory 520. , So that the method in the above method embodiment is executed.

Optionally, the communication device 500 includes one or more processors 510.

Optionally, as shown in FIG. 5, the communication device 500 may further include a memory 520.

Optionally, the memory 520 included in the communication device 500 may be one or more.

Optionally, the memory 520 may be integrated with the processor 510 or provided separately.

Optionally, as shown in FIG. 5, the wireless communication device 500 may further include a transceiver 530, and the transceiver 530 is used for signal reception and/or transmission. For example, the processor 510 is configured to control the transceiver 530 to receive and/or send signals.

As a solution, the communication device 500 is used to implement the operations performed by the network device in the above method embodiments.

For example, the processor 510 is used to implement the processing-related operations performed by the network device in the above method embodiment, and the transceiver 530 is used to implement the transceiving-related operations performed by the network device in the above method embodiment.

As another solution, the communication device 500 is used to implement the operations performed by the terminal device in the foregoing method embodiments.

For example, the processor 510 is used to implement the processing-related operations performed by the terminal device in the above method embodiment, and the transceiver 530 is used to implement the transceiving-related operations performed by the terminal device in the above method embodiment.

The embodiment of the present application also provides a communication device 600, and the communication device 600 may be a terminal device or a chip. The communication device 600 may be used to perform operations performed by the terminal device in the foregoing method embodiments. When the communication device 600 is a terminal device, FIG. 6 shows a simplified schematic diagram of the structure of the terminal device. It is easy to understand and easy to illustrate. In Fig. 6, the terminal device uses a mobile phone as an example. As shown in Figure 6, the terminal equipment includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device. The processor is mainly used to process the communication protocol and communication data, and to control the terminal device, execute the software program, and process the data of the software program. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used for the conversion of baseband signals and radio frequency signals and the processing of radio frequency signals. The antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.

When data needs to be sent, the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal equipment, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data. For ease of description, only one memory and processor are shown in FIG. 6, and in an actual terminal device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or storage device. The memory may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiment of the present application.

In the embodiments of the present application, the antenna and radio frequency circuit with the transceiving function can be regarded as the transceiving unit of the terminal device, and the processor with the processing function can be regarded as the processing unit of the terminal device.

As shown in FIG. 6, the terminal device includes a transceiving unit 610 and a processing unit 620. The transceiving unit 610 may also be referred to as a transceiver, a transceiver, a transceiving device, and so on. The processing unit 620 may also be referred to as a processor, a processing board, a processing module, a processing device, and the like.

Optionally, the device for implementing the receiving function in the transceiving unit 610 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiving unit 610 can be regarded as the sending unit, that is, the transceiving unit 610 includes a receiving unit and a sending unit. The transceiver unit may sometimes be referred to as a transceiver, a transceiver, or a transceiver circuit. The receiving unit may sometimes be called a receiver, a receiver, or a receiving circuit. The transmitting unit may sometimes be called a transmitter, a transmitter, or a transmitting circuit.

For example, in an implementation manner, the transceiver unit 610 is configured to perform the receiving operation of the terminal device in FIG. 2 to FIG. 3. The processing unit 620 is configured to perform processing actions on the terminal device side in FIGS. 2 to 3.

It should be understood that FIG. 6 is only an example and not a limitation, and the foregoing terminal device including a transceiver unit and a processing unit may not rely on the structure shown in FIG. 6.

When the communication device 600 is a chip, the chip includes a transceiver unit and a processing unit. Wherein, the transceiver unit may be an input/output circuit or a communication interface; the processing unit may be a processor, microprocessor, or integrated circuit integrated on the chip.

The embodiment of the present application also provides a communication device 700, and the communication device 700 may be a network device or a chip. The communication apparatus 700 may be used to perform operations performed by a network device in the foregoing method embodiments.

When the communication device 700 is a network device, for example, it is a base station. Figure 7 shows a simplified schematic diagram of the base station structure. The base station includes 710 part and 720 part. The 77 part is mainly used for receiving and sending radio frequency signals and the conversion between radio frequency signals and baseband signals; the 720 part is mainly used for baseband processing and controlling the base station. The part 710 can generally be referred to as a transceiver unit, transceiver, transceiver circuit, or transceiver. The 720 part is usually the control center of the base station, and may generally be referred to as a processing unit, which is used to control the base station to perform the processing operations on the network device side in the foregoing method embodiments.

The transceiver unit of part 710 may also be called a transceiver or a transceiver, etc., which includes an antenna and a radio frequency circuit, and the radio frequency circuit is mainly used for radio frequency processing. Optionally, the device used for implementing the receiving function in part 710 can be regarded as the receiving unit, and the device used for implementing the sending function can be regarded as the sending unit, that is, the part 710 includes the receiving unit and the sending unit. The receiving unit may also be called a receiver, a receiver, or a receiving circuit, and the sending unit may be called a transmitter, a transmitter, or a transmitting circuit, etc.

The 720 part may include one or more single boards, and each single board may include one or more processors and one or more memories. The processor is used to read and execute programs in the memory to implement baseband processing functions and control the base station. If there are multiple boards, each board can be interconnected to enhance processing capabilities. As an optional implementation, multiple single boards may share one or more processors, or multiple single boards may share one or more memories, or multiple single boards may share one or more processing at the same time. Device.

For example, in one implementation, the transceiving unit of part 710 is used to perform the steps related to transceiving and receiving performed by the network device in the embodiment shown in Figures 2 to 3; the part 720 is used to perform the implementation shown in Figures 2 to 3 The steps related to the processing performed by the network device in the example.

It should be understood that FIG. 7 is only an example and not a limitation, and the foregoing network device including a transceiver unit and a processing unit may not rely on the structure shown in FIG. 7.

When the communication device 700 is a chip, the chip includes a transceiver unit and a processing unit. Wherein, the transceiver unit may be an input/output circuit or a communication interface; the processing unit is a processor, microprocessor, or integrated circuit integrated on the chip.

The embodiment of the present application also provides a computer-readable storage medium on which is stored computer instructions for implementing the method executed by the terminal device or the method executed by the network device in the foregoing method embodiments.

For example, when the computer program is executed by a computer, the computer can implement the method executed by the terminal device in the foregoing method embodiments or the method executed by the network device.

The embodiments of the present application also provide a computer program product containing instructions that, when executed by a computer, cause the computer to implement the method executed by the terminal device in the foregoing method embodiments or the method executed by the network device.

An embodiment of the present application also provides a communication system, which includes the network device and the terminal device in the above embodiment.

As an example, the communication system includes: the network device and the terminal device in the embodiments described above with reference to FIG. 2 to FIG. 3.

For explanations and beneficial effects of related content in any of the wireless communication devices provided above, reference may be made to the corresponding method embodiments provided above, and details are not repeated here.

In the embodiments of the present application, the terminal device or the network device may include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. Among them, the hardware layer may include hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also referred to as main memory). The operating system at the operating system layer can be any one or more computer operating systems that implement business processing through processes, such as Linux operating systems, Unix operating systems, Android operating systems, iOS operating systems, or windows operating systems. The application layer can include applications such as browsers, address books, word processing software, and instant messaging software.

The embodiment of this application does not specifically limit the specific structure of the execution subject of the method provided in the embodiment of this application, as long as it can run a program that records the code of the method provided in the embodiment of this application to use the method provided in the embodiment of this application Just communicate. For example, the execution subject of the method provided in the embodiments of the present application may be a terminal device or a network device, or a functional module in the terminal device or the network device that can call and execute the program.

The various aspects or features of the embodiments of the present application can be implemented as methods, devices, or products using standard programming and/or engineering techniques. The term "article of manufacture" used herein can encompass a computer program accessible from any computer-readable device, carrier, or medium. For example, computer-readable media may include, but are not limited to: magnetic storage devices (for example, hard disks, floppy disks, or tapes, etc.), optical disks (for example, compact discs (CD), digital versatile discs (digital versatile disc, DVD), etc.), etc. ), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.).

The various storage media described herein may represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.

It should be understood that the processor mentioned in the embodiments of this application may be a central processing unit (central processing unit, CPU), or other general-purpose processors, digital signal processors (digital signal processors, DSP), and application-specific integrated circuits ( application specific integrated circuit (ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.

It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM). For example, RAM can be used as an external cache. As an example and not a limitation, RAM may include the following various forms: static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM) , Double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) and Direct RAM Bus RAM (DR RAM).

It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, the memory (storage module) can be integrated in the processor.

It should also be noted that the memories described herein are intended to include, but are not limited to, these and any other suitable types of memories.

A person of ordinary skill in the art may realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered as going beyond the scope of the embodiments of the present application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of the description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiment, which is not repeated here.

In the several embodiments provided in the embodiments of the present application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present application are essentially or the part that contributes to the prior art or the part of the technical solutions can be embodied in the form of a software product, and the computer software product is stored in a storage medium. , Including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disks or optical disks and other media that can store program codes. .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the embodiments of this application. , Should be covered in the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims (23)

1. An uplink channel demodulation method, characterized in that it includes:

   Receive the sounding reference signal SRS sent by the terminal equipment;

   Receive the uplink channel sent by the terminal equipment;

   Use the SRS to demodulate the information carried by the uplink channel.
2. The method of claim 1, wherein the uplink channel includes a demodulation reference signal DMRS, and

   Using the SRS to demodulate the information carried by the uplink channel includes:

   Use the SRS and the DMRS to demodulate the information carried by the uplink channel.
3. The method according to claim 1 or 2, wherein the SRS is also used for channel estimation of the uplink channel.
4. The method according to any one of claims 1 to 3, wherein the uplink channel adopts the same transmission parameters as the SRS, and the transmission parameters include at least one of the following parameters:

   Transmission power, antenna port, precoding matrix, or frequency domain resources.
5. The method according to any one of claims 1 to 4, wherein the uplink channel comprises at least one of the uplink shared channel PUSCH and the uplink control channel PUCCH.
6. An uplink channel sending method, characterized in that it comprises:

   Send sounding reference signal SRS to network equipment;

   Sending an uplink channel to the network device;

   Wherein, the SRS is used for demodulation of information carried by the uplink channel.
7. 7. The method according to claim 6, wherein the uplink channel comprises a demodulation reference signal DMRS, and the demodulation of the information carried by the uplink channel is performed based on the SRS and the DMRS.
8. The method according to claim 6 or 7, wherein the SRS is also used for channel estimation of the uplink channel.
9. The uplink transmission method according to any one of claims 6 to 8, wherein the uplink channel adopts the same transmission parameters as the SRS, and the transmission parameters include at least one of the following parameters:

   Transmission power, antenna port, precoding matrix, or frequency domain resources.
10. The uplink transmission method according to any one of claims 6 to 9, wherein the uplink channel includes at least one of the uplink shared channel PUSCH and the uplink control channel PUCCH.
11. An uplink channel demodulation device, characterized in that it comprises:

    The transceiver unit is used to receive the sounding reference signal SRS sent by the terminal equipment, and is used to receive the uplink channel sent by the terminal equipment;

    The processing unit is configured to use the SRS to demodulate the information carried by the uplink channel.
12. The apparatus according to claim 11, wherein the uplink channel comprises a demodulation reference signal DMRS, and

    The processing unit is specifically configured to demodulate the uplink channel according to the SRS and the DMRS.
13. The apparatus according to claim 11 or 12, wherein the SRS is also used for channel estimation of the uplink channel.
14. The apparatus according to any one of claims 11 to 13, wherein the uplink channel uses the same transmission parameters as the SRS, and the transmission parameters include at least one of the following parameters:

    Transmission power, antenna port, precoding matrix, or frequency domain resources.
15. The apparatus according to any one of claims 11 to 14, wherein the uplink channel comprises at least one of the uplink shared channel PUSCH and the uplink control channel PUCCH.
16. An uplink channel sending device, characterized in that it comprises:

    The transceiver unit is used to send a sounding reference signal SRS to a network device, and is used to send an uplink channel to the network device;

    Wherein, the SRS is used for demodulation of information carried by the uplink channel.
17. The apparatus according to claim 16, wherein the uplink channel includes a demodulation reference signal DMRS, and the demodulation of the information carried by the uplink channel is performed based on the SRS and the DMRS.
18. The apparatus according to claim 16 or 17, wherein the SRS is also used for channel estimation of the uplink channel.
19. The uplink transmission apparatus according to any one of claims 16 to 18, wherein the uplink channel adopts the same transmission parameters as the SRS, and the transmission parameters include at least one of the following parameters:

    Transmission power, antenna port, precoding matrix, or frequency domain resources.
20. The uplink transmission apparatus according to any one of claims 16 to 19, wherein the uplink channel includes at least one of the uplink shared channel PUSCH and the uplink control channel PUCCH.
21. A wireless communication device, characterized by comprising a processor, the processor is coupled with a memory, the memory is used for storing computer programs or instructions, and the processor is used for executing the computer programs or instructions in the memory, so that

    The method of any one of claims 1 to 5 is executed, or

    The method of any one of claims 6 to 10 is executed.
22. A computer-readable storage medium, characterized in that it stores a computer program or instruction, and the computer program or instruction is used to implement

    The method of any one of claims 1 to 5, or

    The method of any one of claims 6 to 10.
23. A chip system, characterized by comprising: a processor, used to call and run a computer program from a memory,

    So that the communication device installed with the chip system executes

    The method of any one of claims 1 to 5, or

    The method of any one of claims 6 to 10.

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